Plummet-lamp.



G. V. MARTIN.

PLUMMBT LAMP. APPLIUATiOR FILED MAY 1, 1912.

Patented Feb. 4, 1913.

' Lil Muffin CLAUbE V. MARTIN, OF ZANESVILLE, OHIO.

PLUMMET-LAMP.

Specification of Letters Patent. Patented Feb. 4, 1913,

- Application filed May 1,1912. Serial No. 694,443.

To all whom it may concern Be it known that I, CLAUDE V. MARTIN, a citizen of the United States, residing at Zanesville, in the county of Muskingum, State of Ohio, have invented certain new and useful Improvements in Plummet- Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art towhich it appert-ains to.

make and use the same.

This invention relates to improvements inlamps of that type of lamps which are commonly known as plummet lamps.

The plummet lamps now in general use: include large plummets and the bodies thereof constitute oil reservoirs for the wick; lamps. This form of lamp does not give, a' sustained and steady flame of uniform shape. Furthermore, these lamps quite; often give ofi" smoke which greatly annoys the men who are using the lamp in a mine and size.

or the like and consequently greatly hinders the work to be done. At some places in a mine a point has to be set where the air: circulates very poorly and as a result the flame from this type of lamp is very dim. I This condition of the light causes surveyor too much trouble. Furthermore, after thislamp has been extinguished the wick remains hot and greasy and the lamp cannot pocket until it has beenstruction and the specific description there- The. principal object of the invention is,- therefore, to provide a plummet lamp which includes an electric lamp and a dependingbe carried in the drained.

plummet, the lamp projecting a constant hght of uniform density, and consequently a being unaffected by either the lack of air currents or any sudden aircurrents which may occur.

Another object of the invention is to provide a plummet lamp of the character described which includes a novel means for either spreading the light or concentrating the same as it may be desired.

Afurther object of theinvention is to provide a lamp of the character described, the parts thereof being adapted to be readily detached for the purpose of carrying the same in the pocket'without danger to the clothes. I

. A still further object of the invention is to provide a lamp of the,- character described which is composed of a small number of parts, is therefore simple in construction, and is cheap to manufacture.

With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claims I hereto appended; it being understood that various changes in the form, proportion, size and minor detailsof construction within the scope of the claims may-be resorted to withoutdeparting from the spirit or sacrificing any of'the advantages of the invention. 9

In the drawing: Figure 1 is a-side elevation of a lamp constructed in accordance withmy invention, Fig. 2 is a longitudinal sectional view therethrough, parts thereof being'shown in elevation, Fig. 3 is a detail cross sectional view taken on the line 33 of Fig. 1, Fig. 4 is a sectional view taken on the line 4.4 of Fig. 1, Fig. 5 is an enlarged detail sectional view showing the connection between the lamp and the sleeve, and Fig. 6 is aperspective view of the sleeve.

Like reference numerals designate corresponding parts in all the figures of the drawing.

Referring to the drawing, the invent on comprises an electriclamp which is designated as a whole by the reference letter A. This lamp is of ordinary flash-light conof is not deemed necessary to be given. This lamp includes the'usual casing 5 and lens 6, said casing being provided at the end opposite the lens 6 with a detachable closure element 5. element 5 is. an opening 6 through which the attaching end of an eye-bolt 7 projects. Inner and outer nuts 7 a are engaged with the inner end of the bolt, the opening Formed in the closure which is'adapted to yieldably urge the at- I tery (not shown) for the lamp in its "op A sleeve 10 is slidably mounted upon the lens-end of the casing,

erat-1ve position.

and is provided with diametrically opposed inclined slots 11-11. This sleeve is frictionally held in any adjusted position 11 on the casing. Eye-bolts 12 each pro ect through a respective slot 11 andthrough an opening formed in the casing. 5. Each bolt is secured bye nut 13.

My invention'further comprises a pair of plummets 14-44, the but-tends thereof be mg dis used in 0p osed relation and eo'n' nected y a three. ed stem 15, said stems being centrally formed with a spaced pair of shoulders 16-46 having knurled peripheries for facilitating the turning thereof.

These lummets are disposed vertically one .fabove t e other and disposed around the up- ,per plummet is an inner gimbal' 17, said plummet being swingingly connected thereends of said chains being provided with,

hooks 23-23 for engagement with the eyes of the bolts l2. it will thus be. observed that by means of these pins,- the plummets are supported centrally below the lens 6.

From the foregoing, when it is desired to pro ect the lio'ht over a considerable area the sleeve 10 is rotated in the roper direction and by means'oi the inc ined slots ll, said sleeve will be drawn upwardly over the casing 5 and thereby permit the light rays to spreed. When, however, it" is desired to concentrate the light rays upon the plummets, the sleeve will be moved dovgplwardly as far as desired, as will be use will furthermore be observed that by this form of lamp, there is no danger of either soiling or damaging the clothes of the operator. By forming the opening 6 or the casing larger than the bolt, the true center to which the plummet is to be hanged can be easily ascertained and said bolt can be fixedly secured to'the casing by means of The function of the double the nuts 7.

lummet is to secure an illuminated point irectly above the tip of the lower hob and point in the mine floor on which the surveyor can sight his transit.

What is claimed is:

1. In a plummet lamp, the. combination of an electrically illuminated lamp including a casing, a plummet disposed thereber low, and flexible means connecting the casing and plummet. v

2. In a luinmet lamp, the combination with an e'ectrically illuminated lamp in eluding a casing and a, lens arranged in one end thereof, ote. sleeve mounted on the lens'end or the casing for longitudinal adjustment, and a plummet suspended therebelow. i

I 3. In a plummetlamp, the combination with an electrically illuminated lump including a casing and'a lens arranged in one end there-oi, of a sleeve mounted on the lens end of the cesing and having an inclined slot and longitudinal e. jnstinent, 'nd a plummet suspended therebelow, i

i. In a lummet lamp he combination with a lam of a pair of plummets disposed there elow and arranged with their butt ends in opposed relation, a connection between the plummets, end suspending ineens for the plummets connected to the amp.

in testimony whereof, l afix my signs ture, in presence of two witnesses. understood. It will be observed "theft t e chains 22 may be readily detached from the tem A so as to enable a person: to eeniy place the same in his pocket. lt

CLAUDE V. Mihld'llld. Witnesses: W. G. S nonnsr, my Enwn. Mnrnn. Y s i in connection therewith for 

